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Alternation of generations
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=== In animals === Initially, [[Adelbert von Chamisso]] (studying [[salp]]s, colonial marine animals between 1815 and 1818<ref>{{cite web |title=Object of the month: The poet and the dolphin skull |url=https://www.kulturtechnik.hu-berlin.de/en/object-of-the-month-the-poet-and-the-dolphin-skull/ |publisher=Hermann von Helmholtz-Zentrum fΓΌr Kulturtechnik |access-date=4 May 2024 |date=1 July 2023}}</ref>) and [[Japetus Steenstrup]] (studying the development of [[trematode]]s in 1842, and also [[tunicate]]s and [[cnidarian]]s) described the succession of differently organized generations (sexual and asexual) in animals as "alternation of generations".<ref name="Haig-2008"/> Later, the phenomenon in animals became known as [[heterogamy]], while the term "alternation of generations" was restricted to the life cycles of plants, meaning specifically the alternation of haploid gametophytes and diploid sporophytes.<ref name="Haig-2008">{{Citation |last1=Haig |first1=David |date=2008 |title=Homologous versus antithetic alternation of generations and the origin of sporophytes |journal=The Botanical Review |volume=74 |issue=3 |pages=395β418 |doi=10.1007/s12229-008-9012-x |s2cid=207403936 |url=http://dash.harvard.edu/bitstream/handle/1/11148775/Haig_HomologousVersus.pdf?sequence=3 |access-date=2014-08-17 |archive-date=2014-08-19 |archive-url=https://web.archive.org/web/20140819090641/http://dash.harvard.edu/bitstream/handle/1/11148775/Haig_HomologousVersus.pdf?sequence=3 |url-status=live }}</ref>
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